# memory_get_usage

(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)

memory_get_usage — Returns the amount of memory allocated to PHP

### Beschreibung

memory_get_usage(bool `$real_usage` = `false`): int

Returns the amount of memory, in bytes, that's currently being allocated to your PHP script.

### Parameter-Liste

`real_usage`

  Set this to `true` to get total memory allocated from system, including unused pages. If not set or `false` only the used memory is reported.

> Hinweis:

> PHP does not track memory that is not allocated by `emalloc()`

### Rückgabewerte

Returns the memory amount in bytes.

### Beispiele

Beispiel #1 A memory_get_usage() example

`<?php
// This is only an example, the numbers below will
// differ depending on your system
echo memory_get_usage() . "\n"; // 36640
$a = str_repeat("Hello", 4242);
echo memory_get_usage() . "\n"; // 57960
unset($a);
echo memory_get_usage() . "\n"; // 36744
?>`

### Siehe auch

- memory_get_peak_usage() - Returns the peak of memory allocated by PHP
- memory_limit

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